XPost: sci.electronics.design   
   From: ehsjr@nospamverizon.net   
      
   Jon wrote:   
   > I. GENERATOR TRANSFER CIRCUIT   
   >   
   > The service wire is 000.  I'm not even going to attempt a contactor for   
   > that.  I'd have to wire it hot and there's too much risk.  All I'm going   
   > to do is make a fail-safe circuit to protect the generator when the   
   > power goes back on.  It's only a 10kw generator so I'm using 120vac coil   
   > contactor with contacts rated for 90amps.  I'm going to use the spare   
   > wire from the house to the barn to signal when the grid goes back on.   
   > That will open the circuit and shut down the generator.   
   >   
      
      
      
   >   
   > I'm just a heavy sleeper and want something a little more lowder to wake   
   > me up.   
   >   
      
   Ok. Here is your wake up call.   
      
   The code requires that the transfer equipment make it   
   physically impossible for the generator to be connected   
   to the utility power lines UNDER ANY CONDITIONS.   
      
   Common sense requires that the transfer equipment make it   
   physically impossible for the generator to be connected   
   to the utility power lines UNDER ANY CONDITIONS.   
      
   Safety for personnel requires that the transfer equipment make it   
   physically impossible for the generator to be connected   
   to the utility power lines UNDER ANY CONDITIONS.   
      
   Safety for equipment requires that the transfer equipment make it   
   physically impossible for the generator to be connected   
   to the utility power lines UNDER ANY CONDITIONS.   
      
   USE PROPER TRANSFER EQUIPMENT. HAVE IT PROPERLY INSTALLED BY   
   A LICENSED ELECTRICIAN.   
      
   Ed   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)